Comments for 41J Blog

Comment on HP t5325 thin client hacked to full Debian system by Done

Done — Fri, 05 Jan 2018 07:42:00 +0000

i eventualy got to booting to console and were able to start icewm, but after tampering with /etc/inid.d/rc file i have a screen with INIT:version 2.86 booting.

How can i recover from this?

Comment on SeeedStudio Motorshield V2 with STP 42D206 Stepper by Tony Baker

Tony Baker — Wed, 02 Aug 2017 11:32:00 +0000

Thank you!! It works!!

Comment on PI P-915K238 XY Piezo stage by Charlie Hughes

Charlie Hughes — Sat, 24 Jun 2017 23:09:00 +0000

Hey there, I was thinking of ordering one of these from e-bay. What’s your experience been? Are used units somewhat resilient to wear (could one expect good accuracy from one of these years later) or are you finding lots of stage drift? Do you think its possible to hack together an arduino based controller?

Thanks

Chip

Comment on Accepting incoming tcp connections on the esp8266 (trivial example) by Geoffrey McRae

Geoffrey McRae — Mon, 22 May 2017 09:44:00 +0000

Seems the ‘reconnect’ callback was named very poorly, it is actually the error callback.

Comment on Hacking around with a SDG800 (SDG805) by new299

new299 — Mon, 20 Feb 2017 08:22:05 +0000

In reply to Вадим Барбашов.

Is that as far as it’s getting before crashing? I’d probably try flashing a new u-boot. You should be able to adapt the instructions here to re-flash the u-boot:

http://41j.com/blog/2016/08/sdg800-recovering-from-a-hosed-u-boot/

Comment on Hacking around with a SDG800 (SDG805) by Вадим Барбашов

Вадим Барбашов — Wed, 15 Feb 2017 22:40:00 +0000

Hi!

I have sdg805, which is not loading. And there is no reaction on mmc commands, just hanging up… Can I do something?

Console dump:
U-Boot SPL 2011.09-svn2210 (Dec 29 2014 – 19:42:57)
Texas Instruments Revision detection unimplemented
gpio_request()++
gpio_request()–
gpio_direction_output()++
gpio_direction_output()–
config ddr_pll_config()++
ddr_pll_config()++
ddr_pll_config()–
is_ddr3 = 1
config ddr_pll_config()–
spl_board_init()++

U-Boot 2011.09-svn2210 (Dec 29 2014 – 19:32:29)

I2C: ready
DRAM: 128 MiB
WARNING: Caches not enabled
board_init new()————ddr3
No daughter card present
board_id = 1, header.version = 87fbb320
profile = 1, daughter_board_connected = 0
board_init()–
NAND: HW ECC Hamming Code selected
test-nand_get_flash_type()++

Comment on A Brief Computational Analysis of “Pen-Pineapple Apple-pen” by jānis Bērzins

jānis Bērzins — Wed, 23 Nov 2016 20:11:00 +0000

You are a genius. That is so brilliant.

Comment on MXq – Quad Core Android Thoughts (and console kernel messages) by faulty

faulty — Wed, 26 Oct 2016 07:22:00 +0000

using “find /” might give a clearer picture of the filesystem

Comment on Throwing the BME280 Combined Pressure/Humidity Sensor in a SEM by new299

new299 — Wed, 19 Oct 2016 14:08:00 +0000

In reply to Yves Quemener. It's possible. "mudcracks" seem to be a common feature of spin-coated surfaces, but from what I've seen they look a bit different (I've added some info to the post).

Comment on Throwing the BME280 Combined Pressure/Humidity Sensor in a SEM by Yves Quemener

Yves Quemener — Wed, 19 Oct 2016 07:24:00 +0000

Interesting! It looks like the cracks that happen when mud dries. I suspect they deposit the film in a high humidity environment and dry it to make it crack.